Merge pull request #6 from ignatvilesov/dev/fix-the-broken-unit-tests

15412: Chord: Fix a problem with the broken unit tests

package.json

@@ -33,6 +33,7 @@
     "karma-remap-istanbul": "0.4.0",
     "karma-sourcemap-loader": "0.3.7",
     "karma-typescript-preprocessor": "0.3.0",
+    "typescript": "2.1.4",
     "lodash": "4.16.2",
     "powerbi-visuals-tools": "1.4.3",
     "powerbi-visuals-utils-chartutils": "^0.2.3",